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Glacial History of Cape Cod, Nantucket, and Martha’s Vine Glacial History of Cape Cod, Nantucket, and Martha’s Vine

Glacial History of Cape Cod, Nantucket, and Martha’s Vine - PowerPoint Presentation

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Uploaded On 2016-08-08

Glacial History of Cape Cod, Nantucket, and Martha’s Vine - PPT Presentation

Stefan Sandreuter 16 GE354 Outline Formation of Cape Cod Nantucket and Marthas Vineyard Regional Deposits PostGlacial Holocene Processes Summary Formation of Cape Cod Nantucket and Marthas Vineyard ID: 438907

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Slide1

Glacial History of Cape Cod, Nantucket, and Martha’s Vineyard

Stefan Sandreuter ‘16

GE354Slide2

Outline

Formation of Cape Cod, Nantucket and Martha’s VineyardRegional DepositsPost-Glacial Holocene Processes

SummarySlide3
Slide4

Formation of Cape Cod, Nantucket and Martha’s Vineyard

Three lobes of glacial iceFluctuating Ice FrontEvidenced by till overlying stratified drift; recessional morainesSlide5
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Regional Deposits

Types of depositsGeneral StratigraphyAge of DepositsCosmogenic

Nuclide Dating

MineralogySlide9
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Cosmogenic

Nuclide Ages

Martha’s Vineyard

Buzzard’s Bay

*Radiocarbon dates put glacial deposits between 24,000 and 21,500 years old.Slide14
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Post-Glacial Holocene Processes

Marine and Aeolian ProcessesTwo periods of Holocene modification9,500 – 6,000 B.P6,000 B.P. to modern daySlide17
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Summary

Three lobes of iceFluctuating ice sheetNantucket and Martha’s Vineyard - terminal moraines of the Laurentide Ice SheetSlide20

Summary

Cosmogenic nuclide ages of ~23,000 and 19,000 years from Martha’s Vineyard and Buzzards Bay respectivelySubarkose and quartz arenite

sands from both outwash plains and beaches

Constant marine and

aeolian

modificationSlide21

Questions?